Forum Discussion
othertonka
May 01, 2015Explorer
The first one on the left is for connecting the House battery to the Chassis battery to start the engine if the chassis battery is dead or low. You push it down and hold it there then start the engine, release the switch after it starts. The next switch is for the fan on the dash or up on the counsel at the top of the windshield. The 3rd switch is to use the dash radio and have it run from the house battery instead of having to have the ignition on and then it is running from the chassis battery. To test, Turn the ignition ON and then turn the radio on. then turn the ignition off and the radio should go off, then turn that 3rd switch on and see if the radio comes back on. 4th switch is probably a spare.
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